Security update for the Linux RT Kernel

SUSE Security Update: Security update for the Linux RT Kernel
Announcement ID: SUSE-SU-2022:0544-1
Rating: critical
References: #1177599 #1183405 #1185377 #1187428 #1188605 #1193096 #1193506 #1193861 #1193864 #1193867 #1194048 #1194227 #1194880 #1195009 #1195065 #1195184 #1195254
Cross-References:CVE-2021-22600 CVE-2021-39648 CVE-2021-39657 CVE-2021-45095 CVE-2022-0330 CVE-2022-22942
Affected Products:
  • SUSE Linux Enterprise Micro 5.0
  • SUSE Linux Enterprise Module for Realtime 15-SP2

An update that solves 6 vulnerabilities and has 11 fixes is now available.


The SUSE Linux Enterprise 15 SP2 RT kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

  • CVE-2022-0435: Fixed remote stack overflow in net/tipc module that validate domain record count on input (bsc#1195254).
  • CVE-2021-45095: Fixed refcount leak in pep_sock_accept in net/phonet/pep.c (bnc#1193867).
  • CVE-2022-22942: Fixed stale file descriptors on failed usercopy (bsc#1195065).
  • CVE-2021-22600: Fixed double free bug in packet_set_ring() in net/packet/af_packet.c that could have been exploited by a local user through crafted syscalls to escalate privileges or deny service (bnc#1195184).
  • CVE-2021-39657: Fixed out of bounds read due to a missing bounds check in ufshcd_eh_device_reset_handler of ufshcd.c. This could lead to local information disclosure with System execution privileges needed (bnc#1193864).
  • CVE-2021-39648: Fixed possible disclosure of kernel heap memory due to a race condition in gadget_dev_desc_UDC_show of configfs.c. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation (bnc#1193861).
  • CVE-2022-0330: Fixed flush TLBs before releasing backing store (bsc#1194880).

The following non-security bugs were fixed:
  • bpf: Verifer, adjust_scalar_min_max_vals to always call update_reg_bounds() (bsc#1194227).
  • btrfs: tree-checker: Add EXTENT_ITEM and METADATA_ITEM check (bsc#1195009).
  • btrfs: tree-checker: annotate all error branches as unlikely (bsc#1195009).
  • btrfs: tree-checker: check for BTRFS_BLOCK_FLAG_FULL_BACKREF being set improperly (bsc#1195009).
  • hv_netvsc: Set needed_headroom according to VF (bsc#1193506).
  • net, xdp: Introduce xdp_init_buff utility routine (bsc#1193506).
  • net, xdp: Introduce xdp_prepare_buff utility routine (bsc#1193506).
  • net: allow retransmitting a TCP packet if original is still in queue (bsc#1188605 bsc#1187428).
  • net: mana: Add RX fencing (bsc#1193506).
  • net: mana: Add XDP support (bsc#1193506).
  • net: sch_generic: aviod concurrent reset and enqueue op for lockless qdisc (bsc#1183405).
  • net: sched: add barrier to ensure correct ordering for lockless qdisc (bsc#1183405).
  • net: sched: avoid unnecessary seqcount operation for lockless qdisc (bsc#1183405).
  • net: sched: fix packet stuck problem for lockless qdisc (bsc#1183405).
  • net: sched: fix tx action reschedule issue with stopped queue (bsc#1183405).
  • net: sched: fix tx action rescheduling issue during deactivation (bsc#1183405).
  • net: sched: replaced invalid qdisc tree flush helper in qdisc_replace (bsc#1183405).
  • net_sched: avoid resetting active qdisc for multiple times (bsc#1183405).
  • net_sched: get rid of unnecessary dev_qdisc_reset() (bsc#1183405).
  • net_sched: use qdisc_reset() in qdisc_destroy() (bsc#1183405).
  • nvme: add 'iopolicy' module parameter (bsc#1177599 bsc#1193096).
  • xfrm: fix MTU regression (bsc#1185377, bsc#1194048).

Special Instructions and Notes:

Please reboot the system after installing this update.

Patch Instructions:

To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

  • SUSE Linux Enterprise Module for Realtime 15-SP2:
    zypper in -t patch SUSE-SLE-Module-RT-15-SP2-2022-544=1
  • SUSE Linux Enterprise Micro 5.0:
    zypper in -t patch SUSE-SUSE-MicroOS-5.0-2022-544=1

Package List:

  • SUSE Linux Enterprise Module for Realtime 15-SP2 (x86_64):
    • cluster-md-kmp-rt-5.3.18-73.1
    • cluster-md-kmp-rt-debuginfo-5.3.18-73.1
    • dlm-kmp-rt-5.3.18-73.1
    • dlm-kmp-rt-debuginfo-5.3.18-73.1
    • gfs2-kmp-rt-5.3.18-73.1
    • gfs2-kmp-rt-debuginfo-5.3.18-73.1
    • kernel-rt-5.3.18-73.1
    • kernel-rt-debuginfo-5.3.18-73.1
    • kernel-rt-debugsource-5.3.18-73.1
    • kernel-rt-devel-5.3.18-73.1
    • kernel-rt-devel-debuginfo-5.3.18-73.1
    • kernel-rt_debug-5.3.18-73.1
    • kernel-rt_debug-debuginfo-5.3.18-73.1
    • kernel-rt_debug-debugsource-5.3.18-73.1
    • kernel-rt_debug-devel-5.3.18-73.1
    • kernel-rt_debug-devel-debuginfo-5.3.18-73.1
    • kernel-syms-rt-5.3.18-73.1
    • ocfs2-kmp-rt-5.3.18-73.1
    • ocfs2-kmp-rt-debuginfo-5.3.18-73.1
  • SUSE Linux Enterprise Module for Realtime 15-SP2 (noarch):
    • kernel-devel-rt-5.3.18-73.1
    • kernel-source-rt-5.3.18-73.1
  • SUSE Linux Enterprise Micro 5.0 (x86_64):
    • kernel-rt-5.3.18-73.1
    • kernel-rt-debuginfo-5.3.18-73.1
    • kernel-rt-debugsource-5.3.18-73.1